TheProgrammersBrain34page.swift

TheProgrammersBrain34page.swift

enum CouponStatus {

  case notExist
  case retry
  case expired
  case active

  case get
  case used
  case usable
}

struct Coupon {
  let user: UserCoupon?
  let isActive: Bool
  let expiredDate: Date
}

struct UserCoupon {

  let isUsed: Bool
}


func status(isOwner: Bool?, coupon: Coupon?) -> CouponStatus {

  guard let isOwner = isOwner, let coupon = coupon else {
    return .notExist
  }

  let currentDate = Date()

  if isOwner {
    if !coupon.isActive {
      return .retry
    }

    if !(currentDate < coupon.expiredDate) {
      return .expired
    }

    return .active
  } else {
    if !coupon.isActive {
      return .retry
    }

    if !(currentDate < coupon.expiredDate) {
      return .expired
    }

    if coupon.user == nil {
      return .get
    }

    if coupon.user?.isUsed == true {
      return .used
    }

    return .usable
  }
}